Gaya APA
Seymor, F, D., Fanning, M, B. (1989).
Soil Morfhology, Genesis, and Classification .
Singapore:
John Wiley & Sons.
Gaya MLA
Seymor, Fanning, Delvin., Fanning, M.C, Balluf.
"Soil Morfhology, Genesis, and Classification".
Singapore:
John Wiley & Sons,
1989.
Text.